naaa. The part number you gave shows copper correct? I run the cheap copper Autolites in my car, I just change them every 3rd oil change. A buddy has a stock 97 GTP he runs the Iridium in his with no problems. I personally hate Platinum because they seam to hate high fuel, but I ran them in a muscle car thinking I'd get gains and was I wrong... But that's my opinion on them, I'm sure others love them so to each their own.
The reason I say vac lines is because your MAP is run off the nipple under the snout of your supercharger so it sees both vacuum and boost. If it's not reading boost it will mess with your fuel. Which reminds me also check your electrical connections. Once changing my plugs somehow I snagged the single wire going to my rear knock sensor and jerked it from the sensor. Another guy on here tugged on his harness hard enough to pull one of the pins out if his Output Speed Sensor. Both these issues arose from pulling on the plug wires then when they pop off there's that moment you don't really know what you hit.. LOL Neither of these issues would cause your problem, just giving examples of what can and has happened.
Good Luck!!
